i'm running on a 885W Real power so i don't think the problem is power or overclocking and temp ! something that is so interesting is before crash on GTA My car flying or i couldn't walk and ... ! what's the problem ?!

Anyway Shahryar_NEO welcome aboard. How did you install the 9.1 drivers? Also do you have a GPU on your board? One big thing that helps us trouble shoot problems is knowing the specs of your system. Would you mind posting them?

I didn't say it was. But that didn't mean you didn't have two cards installed. Anyway if you had another an Nvidia card in there before than you defiantly need to do a good cleaning of the registry. Personally I always redo my whole OS when I change brands like that. Its not necessary however. I just like to play it safe

I didn't say it was. But that didn't mean you didn't have two cards installed. Anyway if you had another an Nvidia card in there before than you defiantly need to do a good cleaning of the registry. Personally I always redo my whole OS when I change brands like that. Its not necessary however. I just like to play it safe

Read the directions man! It does a far better cleaning in safe mode. It can't delete registry entries if they are in use. Here read this.